1H-Isoindol-1-one, 3,3'-(1,4-phenylenedinitrilo)bis[4,5,6,7-tetrachloro-2,3-dihydro-

CAS 5590-18-1

U.S. production volumes are classified as confidential business information.

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Top sourceNo public record

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023.

Where It Comes From

EPA reports by year

2023: US production Confidential · Imports Confidential

EPA-registered importers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Pigments Services

Why It Matters

Sectors

Plastics & RubberTextilesConsumer ProductsPaints & Coatings

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

Used in 4 sectors as 1 functional role.

•Pigment in Synthetic Dye and Pigment ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Pigment in Wholesale and Retail Trade (20%)Processing—incorporation into formulation, mixture, or reaction product
•Pigment in Paint and Coating Manufacturing (70%)Processing—incorporation into formulation, mixture, or reaction product
•Pigment in Custom Compounding of Purchased Resins (10%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.28/gAaron Chemicals LLC

CountryHong Kong

Pack$141.00 / 500 g

PurityNot recorded

Vendors8 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

7 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$0.30	500 g	—
A2B Chem LLC	United States	$0.54	500 g	98%
AA BLOCKS	United States	$0.71	500 g	98%
AK Scientific, Inc.	United States	$36.40	5 g	—
Angene International Limited	United States	$63.00	5 g	—
Combi-Blocks, Inc.	United States	$128.00	5 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	—

Chemical Identity

CAS5590-18-1

PubChem CIDNot recorded

DTXSIDDTXSID4052219

FormulaC22H6Cl8N4O2

Mol. Weight641.92 g/mol

SMILESClC1=C2C(=O)N=C(NC3=CC=C(NC4=NC(=O)C5=C4C(Cl)=C(Cl)C(Cl)=C5Cl)C=C3)C2=C(Cl)C(Cl)=C1Cl

Data Sources

EPA TSCA InventoryRetrieved 2026-04-29
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

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Brief citations

1H-Isoindol-1-one, 3,3'-(1,4-phenylenedinitrilo)bis[4,5,6,7-tetrachloro-2,3-dihydro- (CAS 5590-18-1) https://chemicalindependence.com/chemical/5590-18-1/ EPA TSCA Inventory: CAS 5590-18-1. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 5590-18-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 5590-18-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting